我的listview根据我在edittext中输入的数字进行更改，当我输入另一个数字时，列表不会改变，并保持与前一个数字类型相同的项目。
这是适配器：
public class ElectorListAdapter extends BaseAdapter{
private Context activity;
private LayoutInflater inflater;
private List<Electors> DataList;
private ArrayList<Electors> arraylist=null;
// private ItemFilter mFilter = new ItemFilter();
public ElectorListAdapter(Context activity, List<Electors> electors) {
this.activity = activity;
this.DataList = electors;
this.arraylist = new ArrayList<Electors>();
this.arraylist.addAll(electors);
inflater = LayoutInflater.from(activity);
}
@Override
public int getCount() {
return DataList.size();
}
@Override
public Object getItem(int location) {
return DataList.get(location);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (inflater == null)
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.elector_info_cell_list, null);
TextView name = (TextView)convertView.findViewById(R.id.name);
TextView status = (TextView)convertView.findViewById(R.id.status);
Electors m = DataList.get(position);
//97697691
name.setText(m.getName());
status.setText(m.getStatus().toString());
return convertView;
}
}
这是MainActivity中的植入：
adapter = new ElectorListAdapter(this, list);
lv.setAdapter(adapter);
lv.setTextFilterEnabled(true);
在这里我清除了清单：
serial.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean hasFocus) {
if (!hasFocus) {
serialno = serial.getText().toString();
if(serial.getText()!=null){
//list = new ArrayList<>();
list.clear();
getlist();
}else if(serial.getText()==null){
lv.setVisibility(v.GONE);
}
}
}
});
这里是getlist（）;
public void getlist(){
//list = new ArrayList<>();
try {
RequestQueue requestQueue = Volley.newRequestQueue(getApplicationContext());
String URL = "http://gickuwait-dev.com/electionapi/api/electors";
JSONObject jsonBody = new JSONObject();
// jsonBody.put("tblRegisteredUsers_nickName", username.getText().toString().trim());
jsonBody.put("SerialNo", serialno.toString().trim());
final String requestBody = jsonBody.toString();
StringRequest stringRequest = new StringRequest(Request.Method.POST, URL, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
//my response later should be changed
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("VOLLEY", error.toString());
}
})
{
@Override
public String getBodyContentType() {
return "application/json; charset=utf-8";
}
@Override
public byte[] getBody() throws AuthFailureError {
try {
return requestBody == null ? null : requestBody.getBytes("utf-8");
} catch (UnsupportedEncodingException uee) {
VolleyLog.wtf("Unsupported Encoding while trying to get the bytes of %s using %s", requestBody, "utf-8");
return null;
}
}
@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
String responseString;
String json = null;
try {
json = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
responseString = String.valueOf(json).trim();
ArrayList<ElectorResponse> list_response = new ArrayList<ElectorResponse>();
Type listType = new TypeToken<List<ElectorResponse>>() {}.getType();
list_response = new Gson().fromJson(responseString, listType);
for (int i = 0; i < list_response.size(); i++) {
Electors listItemData = new Electors();
listItemData.setName(list_response.get(i).getNameAr());
listItemData.setStatus(list_response.get(i).getExpr1());
listItemData.setId(list_response.get(i).getPKID());
if (listItemData.getName().startsWith(classletter)){
list.add(listItemData);
}
}
// i should have this piece of code for methods that are running in the background
runOnUiThread(new Runnable() {
@Override
public void run() {
adapter.notifyDataSetChanged();
}
});
// String Check = yourModel.getMessagetitle();
return Response.success(list_response.toString(), HttpHeaderParser.parseCacheHeaders(response));
}
};
requestQueue.add(stringRequest);
} catch (JSONException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}
这里我使用过滤器来过滤列表
name.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before,
int count) {
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable theWatchedText) {
//Vote.this.adapter.getFilter().filter(theWatchedText.toString());
String text = name.getText().toString().toLowerCase(Locale.getDefault());
// Vote.this.adapter.getFilter().filter(text);
search_model(name.getText().toString());
}
});
private void search_model(String key){
search = new ArrayList<>();
for(int i = 0;i<list.size();i++){
Electors electors = list.get(i);
if(electors.getName().toLowerCase(Locale.getDefault()).startsWith(key)){
search.add(electors);
}
}
adapter = new ElectorListAdapter(this, search);
lv.setAdapter(adapter);
lv.setTextFilterEnabled(true);
}
当我输入另一个数字时，如何让它更改其值，适配器中是否缺少某些内容？提前谢谢
答案 0 :(得分：0)
您需要通过notifyDatasetChanged（）
通知数据集的更改列表答案 1 :(得分：0)
数据更改时应该有清晰的数组列表。然后将新文本添加到数组列表并更新它。
arraylist.clear(); //to clear array list
arraylist.add(); //to add new text
adapter.notifyDataSetChanged(); //to notify adapter
答案 2 :(得分：0)
if(serial.getText()!=null){
//list = new ArrayList<>();
list.clear();
// since you removed the item you need to inform the adapter to
//refresh view
adapter.notifyDataSetChanged();
// also as soon as getlist(); gets new list , set that list on adapter and call
// adapter.notifyDataSetChanged();
getlist();
}